Transmission and motor oil



not satisfactory WALTER K.

BOILEA'U, OF BALTIMORE, MARYLAND, ASSIGNOR TO PITTSBURGH DEL REFINKNG CORYORATION, A CORPORATION OF DELAWARE.

TRANSMISSION AND MOTOR OIL.

.No Drawing.

T 0 all whom it may concern:

Be it known that I. VVALTER K. BOILEAU, a citizen of the United States of America. residing in the city of Baltimore, State of lllaryla-nd, have invented certain new and useful Improvements in Transmission and Motor Oils, of which the following is a specification.

The invention relates to an internal combustion motor oil. or internal combustion engine cylinder oil, which, though it is capable of use with any type of internal combustion engine, is particularly adapted for use with the type of cars having the planet'- ary transmission, which is controlled by means of fabric bands or more properly metallic bands having fabric linings. ne of the ditliculties incident to the operation of such cars has been that the bands or linings acquire a hard, glazed surface and become brittle, so that they slip and chatter, giving a mostunsatisfactoigy soon wear out. These di culties are well understood by those familiar with the operation of this type of car.

Tn automobiles of this type the crank case ordinarily forms a single or connected compartment with the transmission case, so that the same oil flowing from one tothe other lubricates both the engine cylinders and bearings and thetransmission, also keeping the transmission bands saturated, and for this purpose it has been customary to use ordinary internal combustion motor oil, otherwise known as internal combustion engine cylinder oil, which is ordinarily a pure petroleum oil having the requisite viscosity and other properties. As related, this is for transmission bands.

The present invention relates to a motor oil or internal combustion engine cylinder oil, and transmission oil particularly adapted as toresaid to the type of cars having the planetary transmission in communication with the crank case, the object being to provide an oil which is not only available to lubricate the motor-cylinders and bearings and the transmission gears and bearings, but which also lubricates the transmission bands or more properly the fabric linings of the bands keeping them in condition, so that chattering is avoided, the bands being always soft and pliable so that they do not slip, and so that too sudden gripping is avoided. Tn this way the durability of the Specification of Letters Patent.

operation, and.

Patented July 25, 13922.

Application filed .Yune 5, 1922. Serial No. 566,151.

bands or their time of service is greatly extended, and the wear on the car is greatly reduced, as chattering of the bands causes depreciation of the entire drive from the engine to the rear wheels. p

The oil which is the subject of the invention consists of a petroleum base, having substantially the properties ordinarily used for internal combustion engine cylinder oil, having a viscosity of from 200 to 4:00 seconds at 100 degrees Fahrenheit, combined with two or three to ten or twelve per cent of another oil or grease of. vegetable or animal origin as distinguished from petroleum oil, these oils or greases are wholly or partially saponifiable and are otherwise referred to as fatty oils or greases. Preferably I use a neutral wool fat or grease, this may be obtained by neutralizing the fatty acid of natural degras and removing the. alkali and neutralized acid by washing and settling or centrifuging so that the product which is termed neutral wool fat contains no soap or alkali, and practically no acid. The term neutral wool tat in the claims means this substance.

The oil at present in use, made in accordance with my invention, contains 5% neutral wool fat, the remainder being a petroleum oil, and the product of my invention may be of a viscosity of from 200 to 4:00 seconds at 100 degrees Fahrenheit, measured in a Saybolt universal viscosimeter, and the fire test preferably varies from 4:00 to 500 degrees Fahrenheit.

The applicant is fully acquainted with the practice regarding the combining of steam engine cylinder oils recited in Friction, Lubrication, @ils and Fats by Dietrichs, Philadelphia 1906, pages 6? to 69 referring to steam refined residuum stock which has long been known to all manufacturers of steam engine cylinder I oils. These are a widely different product from motor oils, and not capable of use in the cylinders of internal combustion en ines. Such oils can be easily distinguished; as they possess a viscosity at the temperature given, i. e. 100 degrees Fahrenheit of -from 900 to 1100 seconds.

T have thus described specifically and in detail a motor oil in accordance with my invention. I would however have it understood .that the specific terms herein are used descriptively rather than in a limiting sense,

2. An oil for the lubrication of internal 1-5 combustion engine cylinders, bearings, planetary transmissions and fabric linings of transmission bands of automobile power plants, consisting of petroleum oil of from 200 to 400 seconds viscosity at 100 degrees 20 Fahrenheit, combined with 2 to 12 per cent neutral Wool fat.

Signed by me at Baltimore, Maryland, this'Brd day of June, 1922.

VALTER K BOILEAU. \Vitnesses Po'RTnR H. FLAUTT, EDWIN F. SAMUELS. 

